(function(window, document, undefined) {
		var hearts = [];

		window.requestAnimationFrame = (function() {
			return window.requestAnimationFrame
					|| window.webkitRequestAnimationFrame
					|| window.mozRequestAnimationFrame
					|| window.oRequestAnimationFrame
					|| window.msRequestAnimationFrame || function(callback) {
						setTimeout(callback, 1000 / 60);
					}
		})();

		init();

		function init() {
			css(".heart{width: 40px;height: 40px;position: fixed;background: #f00;transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);}.heart:after,.heart:before{content: '';width: inherit;height: inherit;background: inherit;border-radius: 50%;-webkit-border-radius: 50%;-moz-border-radius: 50%;position: absolute;}.heart:after{top: -20px;}.heart:before{left: -20px;}");
			attachEvent();
			gameloop();
		}

		function gameloop() {
			for (var i = 0; i < hearts.length; i++) {
				if (hearts[i].alpha <= 0) {
					document.body.removeChild(hearts[i].el);
					hearts.splice(i, 1);
					continue;
				}

				hearts[i].y--;
				hearts[i].scale += 0.004;
				hearts[i].alpha -= 0.013;
				hearts[i].el.style.cssText = "left:" + hearts[i].x + "px;top:"
						+ hearts[i].y + "px;opacity:" + hearts[i].alpha
						+ ";transform:scale(" + hearts[i].scale + ","
						+ hearts[i].scale + ") rotate(45deg);background:"
						+ hearts[i].color;
			}

			requestAnimationFrame(gameloop);
		}

		function attachEvent() {
			var old = typeof window.onclick === "function" && window.onclick;
			window.onclick = function(event) {
				old && old();
				createHeart(event);
			}
		}

		function createHeart(event) {
			var d = document.createElement("div");
			d.className = "heart";
			hearts.push({
				el : d,
				x : event.clientX - 5,
				y : event.clientY - 5,
				scale : 1,
				alpha : 1,
				color : randomColor()
			});

			document.body.appendChild(d);
		}

		function css(css) {
			var style = document.createElement("style");
			style.type = "text/css";
			try {
				style.appendChild(document.createTextNode(css));
			} catch (ex) {
				style.styleSheet.cssText = css;
			}

			document.getElementsByTagName('head')[0].appendChild(style);
		}

		function randomColor() {
			return "rgb(" + (~~(Math.random() * 255)) + ","
					+ (~~(Math.random() * 255)) + ","
					+ (~~(Math.random() * 255)) + ")";
		}

	})(window, document);